In the 30 years since Open University was established, an important lesson has been learned by people.
在开放式大学成立后的30年里，人们得到了一条重要的经验。
Open your window, and, yes, you are bound to admit a few flies; but the main lesson of recent British history is that fresh air is good for you.
打开窗，是的，必定会有几只苍蝇飞进来，但是英国近代史给我们最主要的经验是：新鲜的空气有益健康。
Then, teacher to one-to-one teaching, but the previous lesson is open for parents and children will do is to observe!
接着，老师进行一对一的教学，但是前几次课是为家长开设的，而孩子所要做的就是观察！
Therefore, it's very necessary to open a psychological lesson to college students, helping them get through this period smoothly.
因此，向大学生开设心理课程是有必要的，能够帮助他们顺利度过这一时期。
Let that irony be a lesson to you: Never open an attachment, even from a friend, unless you've been told to expect it.
从这个讽刺中吸取点教训吧：千万别打开附件，就算是朋友的邮件也不可以，除非你事先得到通知。
To experience the culture of middle east, we have gather the famous teacher to open the basic lesson for Arabic, 45 Lesson, small class only cost 2000 RMB.
感受中东文化，体验不同生活。现有阿拉伯语初级学习班开班，名师教学，开班灵活，小班上课，45课时人民币2000元。
Each 60-minute session will involve a "transfer drill" and then some open time for questions and answers on a previous lesson tip.
在60分钟的课程中，先是推杆重心转移训练，然后是针对上节课的提问时间。
Each 60-minute session will involve a "transfer drill" and then some open time for questions and answers on a previous lesson tip.
在60分钟的课程中，先是推杆重心转移训练，然后是针对上节课的提问时间。
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